CVE-2026-77534 Privilege escalation in Cloud Gateways
Low-privileged network attackers can escalate privileges on UniFi OS devices due to improper access control flaws.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-77534?
CVE-2026-77534 is a critical vulnerability in Ubiquiti Inc Cloud Gateways, published on 26 Aug 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
A malicious actor with access to the network and low privileges could exploit an Improper Access Control vulnerability found in certain devices running UniFi OS to escalate privileges within such UniFi OS devices or instances.
Weakness: CWE-284
Which versions are affected by CVE-2026-77534?
How do I fix CVE-2026-77534?
No fix has been published for CVE-2026-77534 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-77534 being exploited?
There is no known exploitation of CVE-2026-77534 in the wild and no public exploit code.
Sources
Also known as GHSA-fqc4-369q-46m3.